Refrigerating apparatus



March 8, 1932. R. E. FLEMING REFRIGERATING APPARATUS Filed July so. 1927 2 Sheets-Sheet March 8, 1932. 'R E, FLEWNG 1,848,121

REfRIG ERATING APPARATUS Filed July 30. 1927 2 Sheets-Sheet 2 61cm neq Patented Mar. 8, 1932 ROBERT E. FLEMING, F DAYTdN, OHIO,

PATENT OFFICE assrenon, BY ms ASSIGNMENTS, "ro

FRIGIDAIR-E CORPORATION, A. CORIPORATIGN 'OF DELAWARE REFRIGERATIN G APPARATUS Application filed July 30,

This invention relates to refrigerating apparatus, particularly small household or commercial plants of the compressor-condenser-expander type.

One of the objects of the invention is to improve the construction and arrangement of the condenser to make possible more effective cooling. 1

Another object is to arrange the condenser to facilitate the circulation of air.

Another object is to reduce the noise formerly characteristic of this type. I

Another object is to provide an'improved and compact machine unit for refrigerating systems. i

- Still another object is to construct a condenser of units or sections to enable the capacity of the condenser to be readily increased without the like.

Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawings, wherein a preferred form of the present invention is clearly shown.

i In the drawings Fig. l is a front elevationof a refrigerating apparatus embodying one forin of my invention, the system to which it is applied'being indicated diagrammatically, l

Fig. 2 is a plan of a portion of the apparatus shown in Fig. 1, and I Fig. 3ii s a section on theline 33 of Fig.

Referring to Fig. l, the-system comprises a conventional compressor 10, driven by a motor 'llfwhich draws gaseous refrigerant from an evaporator diagrammatically represented at 13 and delivers it in compressed gaseous form to a condenser generally denoted by 14. The refrigerant condenses to liquid and flows to a-vreceiver 15 (Fig. 3), the liquid being forced into the evaporator .by the pressure developed by the compressor.

air cooled plants of requiring new coils, forms or objectionable for two reasons:

f First, the fan required was so 1927. Serial N0. 209,561.

The motor is automatically started and i stopped in response to conditions in the system by a pressure responsive switch 16.

In order to cool the compressed refrigerant efi'ectively with air, it is necessary to have a condenser of large surface compared to the volume of refrigerant it contains. The usual manner. of constructing such a condenser has been to provide one or more coils 20 woundof tubing of small bore, for exam- 55 ple of the order of of'an inch. Frequently the tubing is flattened to provide more surface per unit volume. It has been customary to provide two such coils, and .to cool them by placing one at either side of the motor and 00 placing a fan 15 on the motor shaft. The fan blows air over the coils, the motor serving to deflect the air thru the coils soinewhat, as shown by the arrows in Fi 2'.

The apparatus thusfar described is pref- 66 erably arranged with the compressor, motor; and condenser mounted on'the upper side of a base 12, while the receiver 15is mounted on the lower side of the base. The base may be suitably fabricated from an 1e iron mem bers 13 and may have legs 14 y which itis supported. Eaich coil of the condenser may be supported by suitable upright members 21 shown best in Fig. 3, which are clamped-to the base 12 as shown in Fig. 1. I

The condensers heretofore made-[have been large that it Iiiadean objectionable noise.

Second, the air currents did not reach all parts-ofI-f'theco enser tubing, hence a large portion of-the'i condenser. was ineffective to liquefy the" refrigerant 1 In order to-remf dy-these defects,-I provide means whereby the air set in motion'by the 3 fan is carried to all parts of the condenser and thus the effectiveness of the condenser is increased. This permits the size of the fan'to be reduced and permits multiplication of the conde'nserunits or lcoils without sacriiicirlgl efliciency. As shown in Figs. 2 and 3,-the

coils are arranged parallel to the motor shaft, with the fan at one end of the coils. At the other end of the coils, that is opposite the fan, I arrange a baflie 30. As shown best in Fig.2, this baflle extends entirely across" the condenser and has itsends 31 turned forward in the direction of the fan so as to overlap the coils 20. To enable the'baflie to be placed close to the condenser coils, it may have a dished or recessed portion 32 which the motor, and these are prevented from escaping, except bypassing through the condenser coils, by the lip 33 whichgmay be formed integrally with the bafie, and which extends horizontally above the motor substantially the entire distance between the groups of coils. Thus any air deflected upwardly by the motoris deflected laterally and passes thru the coils as shown by the arrows in Fig. 1.

The ends of the condenser coils remote from the fan are, in previously known apparatus out of the path ofair currents, the air either passing along the motor between the coils, or being deflected thru the coils before it reaches the ends. These remote ends of the coils in my arrangement are completely bathed in air currents.

This enables me to increase the capacity of the condenser simply by using two or more coils 20 on each side of the motor, because all parts of allof the coils are efiectively cooled by air currents. This is a considerable advantage when it is occasionally desired to make a condenser of large capacity. A single sizeof coil, made from the same form, is all that is needed, both for condensers of large and of small capacities. This saves factory equipment and storage space,'and reduces the number of stock coils necessary to be kept on hand.

The .baflle may be supported in any convenient manner, but the'spreferred manner of supporting it is shownin the drawings, especially Fig. 3. The motor is mounted substantially at the vertical center of the condenser coils. To accomplish this, itis ele-.

vated somewhat above the base 12;, Thegn' otor itself is supportedfon a si 1b-bas'e,'formed of two angle-irons 35 which are supported above the base 13 by being secured by rivets 36 (Fig. 1) to the uprights 37 of two U-' shaped supports 38 which rest on, and are suitably fastened to the angle-irons 13. .At the side away from the fan 15. the supports 38 are formed with horizontal extensions 40 which furnish support for the bafile. The latter is formed with a horizontal lip 41, which maybe integral with it, and which may be re- .inforced by an angle-iron 42 welded to the baflle. The lip 41 is bolted to the extensions 40 by bolts 42a. The upper bafie or hp 33 may be formed with a stiflening l'lb 43, and may be bolted by bolts 44 to a cross bar 45 supported on the uprights 21 Wind]. support the coils. Preferably the motor drives the compressor by means of a belt and pulley wheels 51 and 52. The belt as well as the fan are enclosed 'by'a guard 53 which may be covered by wire mesh as indicated at 54 in Fight.

While the form of embodiment of the 1n- 'vention as herein disclosed, constitutes a preferred form, it is to be understood that other forms might be adopted, all coming within the scope of the claims which follow.

at is claimed is as. follows:

1. Refrigerating apparatus comprising in combination, a motor, a condenser inclu 'ng cooling conduits arranged on opposite sides .of the motor, a fan driven by the motor for cooling the condenser, the motor bein'g arranged to deflect the air moved by the fan, and means above the motor for directing up wardly deflected air in contact with the conduits.

2. Refrigerating apparatus comprising in combination, a condenser including spaced heat exchange devices, a fan at one end of the condenser, and a bafile extending across the .other end of the condenser, said baflie being disposed close to the condenser, said baflle having a recessed portion between the devices adapte to receive a motor for driving the fan.

3. Refrigerating apparatus including in combination a condenser, a fan mounted at one end of the condenser, and a baflle at'the other end of the condenser arranged to deflect over the condenser air blowing through the condenser, said baflle having portions extending toward the fan at the sides of the condenser.

4. Refrigerating apparatus including in combination a condenser, a fan mounted at one, end of the condenser and a baflle at the other end of the condenser arranged to de flect over the condenser air blowing through the condenser, said baflle having a ortion turned toward the fan at the top of t e condenser.

one end of the condenser and a U-shaped baffle at the other end of the condenser extendmg entirely across the condenser and arranged to deflect over the condenser air blowing through the condenser, said baflle having its ends over-lapping the condenser in v the direction of the fan.

' 6. Refrigerating apparatus includin in combination a condenser having spaced, eat

exchange devices, a fan for cooling the condenser having its axis located between said devices, a. baflle extending across the con-' denser at the end op osite the fan and dis- 5 posed transverse to t e axis of the fan, and a second bafile' disposed between the devices if substantially parallel to the axis of the testimony whereof I hereto aflix my 10 slgnature.

ROBERT E. FLEMING. 

